(19)
(11) EP 0 088 487 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.10.1986 Bulletin 1986/44

(43) Date of publication A2:
14.09.1983 Bulletin 1983/37

(21) Application number: 83300225

(22) Date of filing: 18.01.1983
(84) Designated Contracting States:
DE FR GB

(30) Priority: 19.01.1982 JP 633582

(71) Applicant: FUJITSU LIMITED
 ()

(72) Inventors:
  • Suzuki, Hirokazu
     ()
  • Akiyama, Takehiro
     ()

   


(54) Semiconductor device, e.g. for controlling a thermal printing head


(57) A semiconductor device which is used, for example, for controlling and driving thermal heads of a thermal printer facsimile apparatus, comprises a first circuit (1) activated when power is supplied to the semiconductor device and a second circuit (2) activated only when both power and a signal from a power control circuit (7) are applied to the semiconductor device. In the facsmile apparatus, data storing circuits (8) form part of the second circuit and are activated from a power switching circuit (6) receiving the control signal when the thermal heads are to print on the record medium data elements provided by output buffer circuits (11). These form part of the first circuit and are controlled by the data storing circuits. The activation of the second circuit is removed when printing of the data elements is completed and the record medium is to be advanced to the next printing position.






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